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Interference of chiral Andreev edge states

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Date
2020-08-01
Authors
Zhao, L
Arnault, EG
Bondarev, A
Seredinski, A
Larson, TFQ
Draelos, AW
Li, H
Watanabe, K
Taniguchi, T
Amet, F
Baranger, HU
Finkelstein, G
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(12 total)
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Abstract
© 2020, The Author(s), under exclusive licence to Springer Nature Limited. The search for topological excitations such as Majorana fermions has spurred interest in the boundaries between distinct quantum states. Here, we explore an interface between two prototypical phases of electrons with conceptually different ground states: the integer quantum Hall insulator and the s-wave superconductor. We find clear signatures of hybridized electron and hole states similar to chiral Majorana fermions, which we refer to as chiral Andreev edge states (CAESs). These propagate along the interface in the direction determined by the magnetic field and their interference can turn an incoming electron into an outgoing electron or hole, depending on the phase accumulated by the CAESs along their path. Our results demonstrate that these excitations can propagate and interfere over a significant length, opening future possibilities for their coherent manipulation.
Type
Journal article
Subject
cond-mat.mes-hall
cond-mat.mes-hall
cond-mat.supr-con
quant-ph
Permalink
https://hdl.handle.net/10161/21904
Published Version (Please cite this version)
10.1038/s41567-020-0898-5
Publication Info
Zhao, L; Arnault, EG; Bondarev, A; Seredinski, A; Larson, TFQ; Draelos, AW; ... Finkelstein, G (2020). Interference of chiral Andreev edge states. Nature Physics, 16(8). pp. 862-867. 10.1038/s41567-020-0898-5. Retrieved from https://hdl.handle.net/10161/21904.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

Baranger

Harold U. Baranger

Professor of Physics
The broad focus of Prof. Baranger's group is quantum open systems at the nanoscale, particularly the generation of correlation between particles in such systems. Fundamental interest in nanophysics-- the physics of small, nanometer scale, bits of solid-- stems from the ability to control and probe systems on length scales larger than atoms but small enough that the averaging inherent in bulk properties has not yet occurred. Using this ability, entirely unanticipated phenomena ca
Draelos

Anne Draelos

Postdoctoral Associate
Finkelstein

Gleb Finkelstein

Professor of Physics
Gleb Finkelstein is an experimental physicist interested in inorganic and biologically inspired nanostructures: carbon nanotubes, graphene, and self-assembled DNA 'origami'. These objects reveal a variety of interesting electronic properties that may form a basis for future detectors and sensors, or serve as individual devices in quantum information processing.
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